Repadmin /showutdvec

Displays the highest committed Update Sequence Number (USN) that Active Directory Domain Services (AD DS) on the targeted domain controller shows as committed for itself and its transitive partners.

The up-to-dateness vector (UTDVEC) shows the highest USN that the destination domain controller has received by replication, in the form of changes it has received from its direct and transitive replication partners for the specified partition.

Destination domain controllers start with the last received USNchanged attribute when they request changes from a specified source.

All USNs for a specified source domain controller appear in the context of the local USN for that source, not the USNs on the destination domain controller.

The UTDVEC for a local domain controller shows the highest committed USN on which the domain controller has performed inbound replication or that it originated.

This command output lists current and historical replication partners, including transitive replication partners.

By comparing the USNs from this command output on a source and destination domain controller, you can determine how current a destination domain controller is compared to its source partner.

You may detect USN rollbacks if you run this command when the destination domain controller has a higher committed USN than the source domain controller. For best results, and to avoid false USN rollbacks, obtain this command output from destination domain controllers immediately followed by source domain controllers.